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|Title:||Coenzyme B12 model studies: Equilibria and kinetics of axial ligation of trifluoroethyl(aquo)cobaloximes by N donor ligands|
|Authors:||Reddy, D Sudarshan|
|IPC Code:||Int Cl.7 C07C 251/70; C07D 233/54|
|Abstract:||Equilibria and kinetics of the reaction of trifluoroethyl(aquo)cobaloximes with imidazole and substituted imidazoles have been studied as a function of pH at 25°C, 1.0 M ionic strength(KCl) by UV -vis spectrophotometry. Comparison of equillibrium constants with respect to ligand are in the order K1-Meimd> KImd > K2-Meimd > K1,2-Meimd > K2-EtiMD which are correlated to basicity and steric factors. The equilibrium constants are correlated to the softness and ability to form dπ-pπ back bonding.|
|Appears in Collections:||IJC-A Vol.43A(10) [October 2004]|
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